Key takeaways
- Seeing water around your heat pump can be alarming, but not every leak means something is broken. Heat pumps naturally remove moisture from the air, especially during cooling, and that water has to go...
- The important question is where the water is appearing.
- During heating or cooling, the outdoor unit may produce water through condensation or defrost cycles.
Seeing water around your heat pump can be alarming, but not every leak means something is broken. Heat pumps naturally remove moisture from the air, especially during cooling, and that water has to go somewhere.
The important question is where the water is appearing.
Water Outside Is Usually Normal
During heating or cooling, the outdoor unit may produce water through condensation or defrost cycles.
Puddles beneath the outdoor unit are generally expected and are rarely a cause for concern.
Water Inside Is Not Normal
If water is dripping from the indoor unit, something usually needs attention.
Common causes include:
- A blocked condensate drain.
- A disconnected drain hose.
- Dirt restricting the drain tray.
- Poor installation angle.
- Frozen indoor coil caused by another fault.
Dirty Filters Can Contribute
Restricted airflow from clogged filters can allow the indoor coil to become excessively cold.
This may lead to ice forming on the coil which later melts and overwhelms the drain system.
Cleaning the filters regularly helps reduce this risk.
Don't Ignore Repeated Leaks
A small drip today can become water damage tomorrow.
If water is reaching walls, carpet or timber flooring, switch the unit off until it has been inspected.
Preventing Drain Problems
Regular servicing includes checking:
- Drain tray condition.
- Drain hose operation.
- Indoor coil cleanliness.
- Overall system performance.
Preventative maintenance is usually far less expensive than repairing water damage.
When Should You Call Holmes Services?
Book a service if:
- Water drips from the indoor unit.
- Leaks return after cleaning the filters.
- The unit freezes up.
- You notice mould around the indoor unit.
- Cooling or heating performance has declined.
Frequently asked questions
Is water outside the heat pump normal?
Yes. Condensation and defrost cycles commonly produce water outdoors.
Can I clear the drain myself?
Sometimes a visible blockage can be removed, but recurring leaks usually require professional servicing.
Can a leaking heat pump damage my home?
Yes. Persistent indoor leaks can damage paint, plasterboard, flooring and surrounding finishes.
Need practical advice for your system?
Holmes Services helps Auckland homeowners and businesses with heat pumps, ventilation, refrigeration and indoor comfort issues.